38065639 has 4 divisors (see below), whose sum is σ = 38122056. Its totient is φ = 38009224.

The previous prime is 38065609. The next prime is 38065663. The reversal of 38065639 is 93656083.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 38065639 - 2⁹ = 38065127 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38065609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27184 + ... + 28549.

It is an arithmetic number, because the mean of its divisors is an integer number (9530514).

Almost surely, 2^38065639 is an apocalyptic number.

38065639 is a deficient number, since it is larger than the sum of its proper divisors (56417).

38065639 is an equidigital number, since it uses as much as digits as its factorization.

38065639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56416.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 38065639 is about 6169.7357317798. The cubic root of 38065639 is about 336.3910053853.

The spelling of 38065639 in words is "thirty-eight million, sixty-five thousand, six hundred thirty-nine".